Points to Consider:
The electromagnetic signature of lightning strokes varies and is different based on whether it is cloud to cloud, cloud to ground or ground to cloud.
A single detector and its processing software is unable to triangulate on a potential strike and so various algorithms have been developed to try to differentiate between electrical noise (The Gorilla's detector is in a city and is surrounded by many sources of electrical interference that may from time to time send out spurious "strikes") and actual strikes. Also because there is no triangulation the distance of a strike is dependent on how close that strike was to the "average" strength of a lightning strike. Strong strikes at long distances may look as close as a weak strike at a closer distance (or even closer).
All in all, this system has limitations, but for general interest, it provides a pretty reasonable interpretation of lightning strikes and can provide some meteorological entertainment to those so inclined.